66
Switching Power Supply S82K
eration
J UNDERVOLTAGE ALARM INDICATOR AND OUTPUT FUNCTION
(ALL MODELS EXCEPT S82K-24024/P24024)
If the output voltage at the output terminal drops to 75% to 90% of the rated voltage, the red indicator of the S82K (DC LOW indicator) will
be lit. In the case of the 90-W, 100-W and S82K-24024T, a voltage drop alarm will be output via the relay available in the models (DC
LOW output).
This function detects the voltage at the output terminal of the Power Supply. To check the precise output voltage, measure the voltage at
the terminal of the load.
Indicator
Voltage Operation of 90-W, 100-W,
S82K-24024T’s output (DC LOW
output) (See Note 2.)
Green: DC ON
Red: DC LOW
If the voltage at the output terminal is more than 82%
of the rated voltage and operation is normal, the
green indicator will be lit and the red indicator will not
be lit.
Green: DC ON
Red: DC LOW
(See Note 1.)
If the voltage at the output terminal drops to below
82% of the rated voltage, the red indicator will be lit.
(See Note 3.)
Green: DC ON
Red: DC LOW
If the voltage at the output terminal is 0 V, both the
green and red indicators will not be lit.
Note: 1. The more the voltage at the output terminal drops, the darker both the green and red indicators will be.
2. The relay contacts have a capacity of 0.1 A at 24 VDC.
3. The red indicator will actually first light at a voltage between 75% and 90% of the rated voltage.
J BLOCK DIAGRAMS
S82K-003jj (3 W)
S82K-007jj (7.5 W, Single Output)
Fuse (1 A)
Noise filter
Inrush current
protection circuit
Rectifier
Drive control
circuit
Photocoupler
AC (L)
AC (N)
Rectifier
– V
+ V
Undervoltage
alarm
indicator
Overload
alarm
circuit
Detector
S82K-007jj (7.5 W, Dual Outputs)
Fuse (1 A)
Noise filter
Inrush current
protection circuit
Rectifier
Drive control
circuit
Photocoupler
AC (L)
AC (N)
Rectifier
– V
+ V
Rectifier
Undervoltage
alarm
indicator
3-terminal
REG
Overload
alarm
circuit
Detector
